edac_mc.c revision 956b9ba156dbfdb9cede2b2927ddf8be2233b3a7
1da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/* 2da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * edac_mc kernel module 349c0dab7e6000888b616bedcbbc8cd4710331610Doug Thompson * (C) 2005, 2006 Linux Networx (http://lnxi.com) 4da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * This file may be distributed under the terms of the 5da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * GNU General Public License. 6da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 7da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Written by Thayne Harbaugh 8da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Based on work by Dan Hollis <goemon at anime dot net> and others. 9da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * http://www.anime.net/~goemon/linux-ecc/ 10da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 11da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Modified by Dave Peterson and Doug Thompson 12da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 13da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 14da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 15da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/module.h> 16da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/proc_fs.h> 17da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/kernel.h> 18da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/types.h> 19da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/smp.h> 20da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/init.h> 21da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/sysctl.h> 22da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/highmem.h> 23da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/timer.h> 24da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/slab.h> 25da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/jiffies.h> 26da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/spinlock.h> 27da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/list.h> 28da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/ctype.h> 29c0d121720220584bba2876b032e58a076b843fa1Dave Jiang#include <linux/edac.h> 3053f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab#include <linux/bitops.h> 31da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <asm/uaccess.h> 32da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <asm/page.h> 33da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <asm/edac.h> 3420bcb7a81dee21bfa3408f03f46b2891c9b5c84bDouglas Thompson#include "edac_core.h" 357c9281d76c1c0b130f79d5fc021084e9749959d4Douglas Thompson#include "edac_module.h" 36da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 3753f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab#define CREATE_TRACE_POINTS 3853f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab#define TRACE_INCLUDE_PATH ../../include/ras 3953f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab#include <ras/ras_event.h> 4053f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab 41da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/* lock to memory controller's control array */ 4263b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlckestatic DEFINE_MUTEX(mem_ctls_mutex); 43ff6ac2a616c85d1215899ffda815e29b699cbd3aRobert P. J. Daystatic LIST_HEAD(mc_devices); 44da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 45da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#ifdef CONFIG_EDAC_DEBUG 46da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 47a4b4be3fd7a76021f67380b03d8bccebf067db72Mauro Carvalho Chehabstatic void edac_mc_dump_channel(struct rank_info *chan) 48da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 49956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tchannel = %p\n", chan); 50956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tchannel->chan_idx = %d\n", chan->chan_idx); 51956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tchannel->csrow = %p\n", chan->csrow); 52956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tchannel->dimm = %p\n", chan->dimm); 534275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab} 544275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 554275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehabstatic void edac_mc_dump_dimm(struct dimm_info *dimm) 564275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab{ 574275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab int i; 584275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 59956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tdimm = %p\n", dimm); 60956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tdimm->label = '%s'\n", dimm->label); 61956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tdimm->nr_pages = 0x%x\n", dimm->nr_pages); 62956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tdimm location "); 634275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < dimm->mci->n_layers; i++) { 644275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab printk(KERN_CONT "%d", dimm->location[i]); 654275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (i < dimm->mci->n_layers - 1) 664275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab printk(KERN_CONT "."); 674275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 684275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab printk(KERN_CONT "\n"); 69956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tdimm->grain = %d\n", dimm->grain); 70956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tdimm->nr_pages = 0x%x\n", dimm->nr_pages); 71da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 72da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 732da1c119fd999cb834b4fe0c1a5a8c36195df1cbAdrian Bunkstatic void edac_mc_dump_csrow(struct csrow_info *csrow) 74da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 75956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tcsrow = %p\n", csrow); 76956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tcsrow->csrow_idx = %d\n", csrow->csrow_idx); 77956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tcsrow->first_page = 0x%lx\n", csrow->first_page); 78956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tcsrow->last_page = 0x%lx\n", csrow->last_page); 79956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tcsrow->page_mask = 0x%lx\n", csrow->page_mask); 80956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tcsrow->nr_channels = %d\n", csrow->nr_channels); 81956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tcsrow->channels = %p\n", csrow->channels); 82956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tcsrow->mci = %p\n", csrow->mci); 83da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 84da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 852da1c119fd999cb834b4fe0c1a5a8c36195df1cbAdrian Bunkstatic void edac_mc_dump_mci(struct mem_ctl_info *mci) 86da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 87956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tmci = %p\n", mci); 88956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tmci->mtype_cap = %lx\n", mci->mtype_cap); 89956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tmci->edac_ctl_cap = %lx\n", mci->edac_ctl_cap); 90956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tmci->edac_cap = %lx\n", mci->edac_cap); 91956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tmci->edac_check = %p\n", mci->edac_check); 92956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tmci->nr_csrows = %d, csrows = %p\n", 93956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches mci->nr_csrows, mci->csrows); 94956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tmci->nr_dimms = %d, dimms = %p\n", 95956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches mci->tot_dimms, mci->dimms); 96956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tdev = %p\n", mci->pdev); 97956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tmod_name:ctl_name = %s:%s\n", 98956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches mci->mod_name, mci->ctl_name); 99956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tpvt_info = %p\n\n", mci->pvt_info); 100da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 101da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 10224f9a7fe3f19f3fd310f556364d01a22911724b3Borislav Petkov#endif /* CONFIG_EDAC_DEBUG */ 10324f9a7fe3f19f3fd310f556364d01a22911724b3Borislav Petkov 104239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov/* 105239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov * keep those in sync with the enum mem_type 106239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov */ 107239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkovconst char *edac_mem_types[] = { 108239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Empty csrow", 109239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Reserved csrow type", 110239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Unknown csrow type", 111239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Fast page mode RAM", 112239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Extended data out RAM", 113239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Burst Extended data out RAM", 114239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Single data rate SDRAM", 115239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Registered single data rate SDRAM", 116239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Double data rate SDRAM", 117239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Registered Double data rate SDRAM", 118239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Rambus DRAM", 119239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Unbuffered DDR2 RAM", 120239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Fully buffered DDR2", 121239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Registered DDR2 RAM", 122239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Rambus XDR", 123239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Unbuffered DDR3 RAM", 124239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Registered DDR3 RAM", 125239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov}; 126239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav PetkovEXPORT_SYMBOL_GPL(edac_mem_types); 127239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov 12893e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab/** 12993e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * edac_align_ptr - Prepares the pointer offsets for a single-shot allocation 13093e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * @p: pointer to a pointer with the memory offset to be used. At 13193e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * return, this will be incremented to point to the next offset 13293e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * @size: Size of the data structure to be reserved 13393e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * @n_elems: Number of elements that should be reserved 134da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 135da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * If 'size' is a constant, the compiler will optimize this whole function 13693e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * down to either a no-op or the addition of a constant to the value of '*p'. 13793e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * 13893e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * The 'p' pointer is absolutely needed to keep the proper advancing 13993e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * further in memory to the proper offsets when allocating the struct along 14093e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * with its embedded structs, as edac_device_alloc_ctl_info() does it 14193e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * above, for example. 14293e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * 14393e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * At return, the pointer 'p' will be incremented to be used on a next call 14493e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * to this function. 145da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 14693e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehabvoid *edac_align_ptr(void **p, unsigned size, int n_elems) 147da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 148da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox unsigned align, r; 14993e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab void *ptr = *p; 150da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 15193e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab *p += size * n_elems; 15293e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab 15393e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab /* 15493e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * 'p' can possibly be an unaligned item X such that sizeof(X) is 15593e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * 'size'. Adjust 'p' so that its alignment is at least as 15693e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * stringent as what the compiler would provide for X and return 15793e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * the aligned result. 15893e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * Here we assume that the alignment of a "long long" is the most 159da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * stringent alignment that the compiler will ever provide by default. 160da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * As far as I know, this is a reasonable assumption. 161da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 162da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (size > sizeof(long)) 163da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox align = sizeof(long long); 164da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox else if (size > sizeof(int)) 165da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox align = sizeof(long); 166da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox else if (size > sizeof(short)) 167da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox align = sizeof(int); 168da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox else if (size > sizeof(char)) 169da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox align = sizeof(short); 170da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox else 171079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson return (char *)ptr; 172da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 173da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox r = size % align; 174da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 175da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (r == 0) 176079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson return (char *)ptr; 177da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 17893e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab *p += align - r; 17993e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab 1807391c6dcab3094610cb99bbd559beaa282582eacDouglas Thompson return (void *)(((unsigned long)ptr) + align - r); 181da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 182da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 183da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/** 1844275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * edac_mc_alloc: Allocate and partially fill a struct mem_ctl_info structure 1854275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * @mc_num: Memory controller number 1864275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * @n_layers: Number of MC hierarchy layers 1874275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * layers: Describes each layer as seen by the Memory Controller 1884275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * @size_pvt: size of private storage needed 1894275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * 190da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 191da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Everything is kmalloc'ed as one big chunk - more efficient. 192da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Only can be used if all structures have the same lifetime - otherwise 193da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * you have to allocate and initialize your own structures. 194da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 195da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Use edac_mc_free() to free mc structures allocated by this function. 196da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 1974275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * NOTE: drivers handle multi-rank memories in different ways: in some 1984275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * drivers, one multi-rank memory stick is mapped as one entry, while, in 1994275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * others, a single multi-rank memory stick would be mapped into several 2004275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * entries. Currently, this function will allocate multiple struct dimm_info 2014275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * on such scenarios, as grouping the multiple ranks require drivers change. 2024275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * 203da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Returns: 204ca0907b9e413bb1d1f3ea123b663535b74928846Mauro Carvalho Chehab * On failure: NULL 205ca0907b9e413bb1d1f3ea123b663535b74928846Mauro Carvalho Chehab * On success: struct mem_ctl_info pointer 206da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 207ca0907b9e413bb1d1f3ea123b663535b74928846Mauro Carvalho Chehabstruct mem_ctl_info *edac_mc_alloc(unsigned mc_num, 208ca0907b9e413bb1d1f3ea123b663535b74928846Mauro Carvalho Chehab unsigned n_layers, 209ca0907b9e413bb1d1f3ea123b663535b74928846Mauro Carvalho Chehab struct edac_mc_layer *layers, 210ca0907b9e413bb1d1f3ea123b663535b74928846Mauro Carvalho Chehab unsigned sz_pvt) 211da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 212da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct mem_ctl_info *mci; 2134275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab struct edac_mc_layer *layer; 214de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab struct csrow_info *csr; 215de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab struct rank_info *chan; 216a7d7d2e1a07e3811dc49af2962c940fd8bbb6c8fMauro Carvalho Chehab struct dimm_info *dimm; 2174275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab u32 *ce_per_layer[EDAC_MAX_LAYERS], *ue_per_layer[EDAC_MAX_LAYERS]; 2184275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab unsigned pos[EDAC_MAX_LAYERS]; 2194275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab unsigned size, tot_dimms = 1, count = 1; 2204275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab unsigned tot_csrows = 1, tot_channels = 1, tot_errcount = 0; 2215926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab void *pvt, *p, *ptr = NULL; 222de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab int i, j, row, chn, n, len, off; 2234275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab bool per_rank = false; 2244275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 2254275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab BUG_ON(n_layers > EDAC_MAX_LAYERS || n_layers == 0); 2264275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* 2274275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * Calculate the total amount of dimms and csrows/cschannels while 2284275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * in the old API emulation mode 2294275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 2304275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < n_layers; i++) { 2314275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab tot_dimms *= layers[i].size; 2324275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (layers[i].is_virt_csrow) 2334275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab tot_csrows *= layers[i].size; 2344275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab else 2354275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab tot_channels *= layers[i].size; 2364275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 2374275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (layers[i].type == EDAC_MC_LAYER_CHIP_SELECT) 2384275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab per_rank = true; 2394275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 240da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 241da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Figure out the offsets of the various items from the start of an mc 242da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * structure. We want the alignment of each item to be at least as 243da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * stringent as what the compiler would provide if we could simply 244da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * hardcode everything into a single struct. 245da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 24693e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab mci = edac_align_ptr(&ptr, sizeof(*mci), 1); 2474275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab layer = edac_align_ptr(&ptr, sizeof(*layer), n_layers); 2484275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < n_layers; i++) { 2494275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab count *= layers[i].size; 250956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "errcount layer %d size %d\n", i, count); 2514275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab ce_per_layer[i] = edac_align_ptr(&ptr, sizeof(u32), count); 2524275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab ue_per_layer[i] = edac_align_ptr(&ptr, sizeof(u32), count); 2534275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab tot_errcount += 2 * count; 2544275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 2554275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 256956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "allocating %d error counters\n", tot_errcount); 25793e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab pvt = edac_align_ptr(&ptr, sz_pvt, 1); 258079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson size = ((unsigned long)pvt) + sz_pvt; 259da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 260956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(1, "allocating %u bytes for mci data (%d %s, %d csrows/channels)\n", 261956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches size, 262956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches tot_dimms, 263956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches per_rank ? "ranks" : "dimms", 264956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches tot_csrows * tot_channels); 265de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab 2668096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson mci = kzalloc(size, GFP_KERNEL); 2678096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson if (mci == NULL) 268da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return NULL; 269da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 270da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Adjust pointers so they point within the memory we just allocated 271da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * rather than an imaginary chunk of memory located at address 0. 272da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 2734275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab layer = (struct edac_mc_layer *)(((char *)mci) + ((unsigned long)layer)); 2744275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < n_layers; i++) { 2754275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->ce_per_layer[i] = (u32 *)((char *)mci + ((unsigned long)ce_per_layer[i])); 2764275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->ue_per_layer[i] = (u32 *)((char *)mci + ((unsigned long)ue_per_layer[i])); 2774275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 278079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson pvt = sz_pvt ? (((char *)mci) + ((unsigned long)pvt)) : NULL; 279da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 280b8f6f9755248026f21282e25cac49a1af698056cDoug Thompson /* setup index and various internal pointers */ 2814275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->mc_idx = mc_num; 2824275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->tot_dimms = tot_dimms; 283da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->pvt_info = pvt; 2844275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->n_layers = n_layers; 2854275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->layers = layer; 2864275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab memcpy(mci->layers, layers, sizeof(*layer) * n_layers); 2874275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->nr_csrows = tot_csrows; 2884275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->num_cschannel = tot_channels; 2894275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->mem_is_per_rank = per_rank; 290da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 291a7d7d2e1a07e3811dc49af2962c940fd8bbb6c8fMauro Carvalho Chehab /* 292de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab * Alocate and fill the csrow/channels structs 293a7d7d2e1a07e3811dc49af2962c940fd8bbb6c8fMauro Carvalho Chehab */ 294de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab mci->csrows = kcalloc(sizeof(*mci->csrows), tot_csrows, GFP_KERNEL); 295de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (!mci->csrows) 296de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab goto error; 2974275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (row = 0; row < tot_csrows; row++) { 298de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab csr = kzalloc(sizeof(**mci->csrows), GFP_KERNEL); 299de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (!csr) 300de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab goto error; 301de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab mci->csrows[row] = csr; 3024275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab csr->csrow_idx = row; 3034275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab csr->mci = mci; 3044275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab csr->nr_channels = tot_channels; 305de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab csr->channels = kcalloc(sizeof(*csr->channels), tot_channels, 306de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab GFP_KERNEL); 307de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (!csr->channels) 308de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab goto error; 3094275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 3104275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (chn = 0; chn < tot_channels; chn++) { 311de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab chan = kzalloc(sizeof(**csr->channels), GFP_KERNEL); 312de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (!chan) 313de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab goto error; 314de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab csr->channels[chn] = chan; 315da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox chan->chan_idx = chn; 3164275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab chan->csrow = csr; 3174275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 3184275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 3194275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 3204275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* 321de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab * Allocate and fill the dimm structs 3224275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 323de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab mci->dimms = kcalloc(sizeof(*mci->dimms), tot_dimms, GFP_KERNEL); 324de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (!mci->dimms) 325de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab goto error; 326de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab 3274275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab memset(&pos, 0, sizeof(pos)); 3284275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab row = 0; 3294275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab chn = 0; 330956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "initializing %d %s\n", 331956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches tot_dimms, per_rank ? "ranks" : "dimms"); 3324275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < tot_dimms; i++) { 333de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab chan = mci->csrows[row]->channels[chn]; 334de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab off = EDAC_DIMM_OFF(layer, n_layers, pos[0], pos[1], pos[2]); 335de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (off < 0 || off >= tot_dimms) { 336de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab edac_mc_printk(mci, KERN_ERR, "EDAC core bug: EDAC_DIMM_OFF is trying to do an illegal data access\n"); 337de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab goto error; 338de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab } 339de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab 340de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab dimm = kzalloc(sizeof(**mci->dimms), GFP_KERNEL); 341de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab mci->dimms[off] = dimm; 3424275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab dimm->mci = mci; 3434275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 344956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(2, "%d: %s%i (%d:%d:%d): row %d, chan %d\n", 345956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches i, per_rank ? "rank" : "dimm", off, 346956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches pos[0], pos[1], pos[2], row, chn); 3474275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 3485926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab /* 3495926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab * Copy DIMM location and initialize it. 3505926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab */ 3515926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab len = sizeof(dimm->label); 3525926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab p = dimm->label; 3535926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab n = snprintf(p, len, "mc#%u", mc_num); 3545926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab p += n; 3555926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab len -= n; 3565926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab for (j = 0; j < n_layers; j++) { 3575926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab n = snprintf(p, len, "%s#%u", 3585926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab edac_layer_name[layers[j].type], 3595926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab pos[j]); 3605926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab p += n; 3615926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab len -= n; 3624275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab dimm->location[j] = pos[j]; 3634275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 3645926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab if (len <= 0) 3655926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab break; 3665926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab } 3675926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab 3684275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* Link it to the csrows old API data */ 3694275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab chan->dimm = dimm; 3704275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab dimm->csrow = row; 3714275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab dimm->cschannel = chn; 3724275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 3734275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* Increment csrow location */ 3744275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab row++; 3754275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (row == tot_csrows) { 3764275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab row = 0; 3774275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab chn++; 3784275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 379a7d7d2e1a07e3811dc49af2962c940fd8bbb6c8fMauro Carvalho Chehab 3804275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* Increment dimm location */ 3814275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (j = n_layers - 1; j >= 0; j--) { 3824275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab pos[j]++; 3834275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (pos[j] < layers[j].size) 3844275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab break; 3854275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab pos[j] = 0; 386da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 387da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 388da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 38981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mci->op_state = OP_ALLOC; 39081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 3918096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson /* at this point, the root kobj is valid, and in order to 3928096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * 'free' the object, then the function: 3938096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * edac_mc_unregister_sysfs_main_kobj() must be called 3948096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * which will perform kobj unregistration and the actual free 3958096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * will occur during the kobject callback operation 3968096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson */ 39753f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab 398da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return mci; 399de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab 400de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehaberror: 401de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (mci->dimms) { 402de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab for (i = 0; i < tot_dimms; i++) 403de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab kfree(mci->dimms[i]); 404de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab kfree(mci->dimms); 405de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab } 406de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (mci->csrows) { 407de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab for (chn = 0; chn < tot_channels; chn++) { 408de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab csr = mci->csrows[chn]; 409de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (csr) { 410de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab for (chn = 0; chn < tot_channels; chn++) 411de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab kfree(csr->channels[chn]); 412de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab kfree(csr); 413de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab } 414de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab kfree(mci->csrows[i]); 415de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab } 416de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab kfree(mci->csrows); 417de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab } 418de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab kfree(mci); 419de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab 420de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab return NULL; 4214275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab} 4229110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_alloc); 423da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 424da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/** 4258096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * edac_mc_free 4268096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * 'Free' a previously allocated 'mci' structure 427da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * @mci: pointer to a struct mem_ctl_info structure 428da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 429da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Coxvoid edac_mc_free(struct mem_ctl_info *mci) 430da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 431956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(1, "\n"); 432bbc560ae677c0f4d7ff8404a21409c99f35b297bMauro Carvalho Chehab 433de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab /* the mci instance is freed here, when the sysfs object is dropped */ 4347a623c039075e4ea21648d88133fafa6dcfd113dMauro Carvalho Chehab edac_unregister_sysfs(mci); 435da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 4369110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_free); 437da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 438bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 439939747bd680eb09bb98792b17a5bfd2f525afe9dMauro Carvalho Chehab/** 440bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * find_mci_by_dev 441bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * 442bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * scan list of controllers looking for the one that manages 443bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * the 'dev' device 444939747bd680eb09bb98792b17a5bfd2f525afe9dMauro Carvalho Chehab * @dev: pointer to a struct device related with the MCI 445bce19683c17485b584b62b984d6dcf5332181588Doug Thompson */ 446939747bd680eb09bb98792b17a5bfd2f525afe9dMauro Carvalho Chehabstruct mem_ctl_info *find_mci_by_dev(struct device *dev) 447da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 448da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct mem_ctl_info *mci; 449da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct list_head *item; 450da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 451956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\n"); 452da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 453da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox list_for_each(item, &mc_devices) { 454da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci = list_entry(item, struct mem_ctl_info, link); 455da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 456fd687502dc8037aa5a4b84c570ada971106574eeMauro Carvalho Chehab if (mci->pdev == dev) 457da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return mci; 458da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 459da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 460da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return NULL; 461da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 462939747bd680eb09bb98792b17a5bfd2f525afe9dMauro Carvalho ChehabEXPORT_SYMBOL_GPL(find_mci_by_dev); 463da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 46481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang/* 46581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * handler for EDAC to check if NMI type handler has asserted interrupt 46681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 46781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiangstatic int edac_mc_assert_error_check_and_clear(void) 46881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang{ 46966ee2f940ac8ab25f0c43a1e717d25dc46bfe74dDave Jiang int old_state; 47081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 471079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson if (edac_op_state == EDAC_OPSTATE_POLL) 47281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang return 1; 47381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 47466ee2f940ac8ab25f0c43a1e717d25dc46bfe74dDave Jiang old_state = edac_err_assert; 47566ee2f940ac8ab25f0c43a1e717d25dc46bfe74dDave Jiang edac_err_assert = 0; 47681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 47766ee2f940ac8ab25f0c43a1e717d25dc46bfe74dDave Jiang return old_state; 47881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang} 47981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 48081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang/* 48181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * edac_mc_workq_function 48281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * performs the operation scheduled by a workq request 48381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 48481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiangstatic void edac_mc_workq_function(struct work_struct *work_req) 48581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang{ 486fbeb4384748abb78531bbe1e80d627412a0abcfaJean Delvare struct delayed_work *d_work = to_delayed_work(work_req); 48781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang struct mem_ctl_info *mci = to_edac_mem_ctl_work(d_work); 48881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 48981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mutex_lock(&mem_ctls_mutex); 49081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 491bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson /* if this control struct has movd to offline state, we are done */ 492bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson if (mci->op_state == OP_OFFLINE) { 493bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson mutex_unlock(&mem_ctls_mutex); 494bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson return; 495bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson } 496bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 49781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* Only poll controllers that are running polled and have a check */ 49881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang if (edac_mc_assert_error_check_and_clear() && (mci->edac_check != NULL)) 49981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mci->edac_check(mci); 50081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 50181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mutex_unlock(&mem_ctls_mutex); 50281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 50381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* Reschedule */ 5044de78c6877ec21142582ac19453c2d453d1ea298Dave Jiang queue_delayed_work(edac_workqueue, &mci->work, 505052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson msecs_to_jiffies(edac_mc_get_poll_msec())); 50681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang} 50781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 50881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang/* 50981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * edac_mc_workq_setup 51081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * initialize a workq item for this mci 51181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * passing in the new delay period in msec 512bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * 513bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * locking model: 514bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * 515bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * called with the mem_ctls_mutex held 51681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 517bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompsonstatic void edac_mc_workq_setup(struct mem_ctl_info *mci, unsigned msec) 51881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang{ 519956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(0, "\n"); 52081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 521bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson /* if this instance is not in the POLL state, then simply return */ 522bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson if (mci->op_state != OP_RUNNING_POLL) 523bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson return; 524bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 52581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang INIT_DELAYED_WORK(&mci->work, edac_mc_workq_function); 52681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang queue_delayed_work(edac_workqueue, &mci->work, msecs_to_jiffies(msec)); 52781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang} 52881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 52981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang/* 53081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * edac_mc_workq_teardown 53181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * stop the workq processing on this mci 532bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * 533bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * locking model: 534bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * 535bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * called WITHOUT lock held 53681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 537bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompsonstatic void edac_mc_workq_teardown(struct mem_ctl_info *mci) 53881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang{ 53981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang int status; 54081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 54100740c58541b6087d78418cebca1fcb86dc6077dBorislav Petkov if (mci->op_state != OP_RUNNING_POLL) 54200740c58541b6087d78418cebca1fcb86dc6077dBorislav Petkov return; 54300740c58541b6087d78418cebca1fcb86dc6077dBorislav Petkov 544bce19683c17485b584b62b984d6dcf5332181588Doug Thompson status = cancel_delayed_work(&mci->work); 545bce19683c17485b584b62b984d6dcf5332181588Doug Thompson if (status == 0) { 546956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(0, "not canceled, flush the queue\n"); 547bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 548bce19683c17485b584b62b984d6dcf5332181588Doug Thompson /* workq instance might be running, wait for it */ 549bce19683c17485b584b62b984d6dcf5332181588Doug Thompson flush_workqueue(edac_workqueue); 55081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang } 55181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang} 55281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 55381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang/* 554bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * edac_mc_reset_delay_period(unsigned long value) 555bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * 556bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * user space has updated our poll period value, need to 557bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * reset our workq delays 55881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 559bce19683c17485b584b62b984d6dcf5332181588Doug Thompsonvoid edac_mc_reset_delay_period(int value) 56081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang{ 561bce19683c17485b584b62b984d6dcf5332181588Doug Thompson struct mem_ctl_info *mci; 562bce19683c17485b584b62b984d6dcf5332181588Doug Thompson struct list_head *item; 563bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 564bce19683c17485b584b62b984d6dcf5332181588Doug Thompson mutex_lock(&mem_ctls_mutex); 565bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 566bce19683c17485b584b62b984d6dcf5332181588Doug Thompson /* scan the list and turn off all workq timers, doing so under lock 567bce19683c17485b584b62b984d6dcf5332181588Doug Thompson */ 568bce19683c17485b584b62b984d6dcf5332181588Doug Thompson list_for_each(item, &mc_devices) { 569bce19683c17485b584b62b984d6dcf5332181588Doug Thompson mci = list_entry(item, struct mem_ctl_info, link); 570bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 571bce19683c17485b584b62b984d6dcf5332181588Doug Thompson if (mci->op_state == OP_RUNNING_POLL) 572bce19683c17485b584b62b984d6dcf5332181588Doug Thompson cancel_delayed_work(&mci->work); 573bce19683c17485b584b62b984d6dcf5332181588Doug Thompson } 574bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 575bce19683c17485b584b62b984d6dcf5332181588Doug Thompson mutex_unlock(&mem_ctls_mutex); 57681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 577bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 578bce19683c17485b584b62b984d6dcf5332181588Doug Thompson /* re-walk the list, and reset the poll delay */ 579bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson mutex_lock(&mem_ctls_mutex); 580bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 581bce19683c17485b584b62b984d6dcf5332181588Doug Thompson list_for_each(item, &mc_devices) { 582bce19683c17485b584b62b984d6dcf5332181588Doug Thompson mci = list_entry(item, struct mem_ctl_info, link); 583bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 584bce19683c17485b584b62b984d6dcf5332181588Doug Thompson edac_mc_workq_setup(mci, (unsigned long) value); 585bce19683c17485b584b62b984d6dcf5332181588Doug Thompson } 58681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 58781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mutex_unlock(&mem_ctls_mutex); 58881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang} 58981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 590bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 591bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 5922d7bbb91c8df26c60d223205a087507430024177Doug Thompson/* Return 0 on success, 1 on failure. 5932d7bbb91c8df26c60d223205a087507430024177Doug Thompson * Before calling this function, caller must 5942d7bbb91c8df26c60d223205a087507430024177Doug Thompson * assign a unique value to mci->mc_idx. 595bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * 596bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * locking model: 597bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * 598bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * called with the mem_ctls_mutex lock held 5992d7bbb91c8df26c60d223205a087507430024177Doug Thompson */ 600079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonstatic int add_mc_to_global_list(struct mem_ctl_info *mci) 601da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 602da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct list_head *item, *insert_before; 603da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct mem_ctl_info *p; 604da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 6052d7bbb91c8df26c60d223205a087507430024177Doug Thompson insert_before = &mc_devices; 606da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 607fd687502dc8037aa5a4b84c570ada971106574eeMauro Carvalho Chehab p = find_mci_by_dev(mci->pdev); 608bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson if (unlikely(p != NULL)) 6092d7bbb91c8df26c60d223205a087507430024177Doug Thompson goto fail0; 610da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 6112d7bbb91c8df26c60d223205a087507430024177Doug Thompson list_for_each(item, &mc_devices) { 6122d7bbb91c8df26c60d223205a087507430024177Doug Thompson p = list_entry(item, struct mem_ctl_info, link); 613da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 6142d7bbb91c8df26c60d223205a087507430024177Doug Thompson if (p->mc_idx >= mci->mc_idx) { 6152d7bbb91c8df26c60d223205a087507430024177Doug Thompson if (unlikely(p->mc_idx == mci->mc_idx)) 6162d7bbb91c8df26c60d223205a087507430024177Doug Thompson goto fail1; 617da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 6182d7bbb91c8df26c60d223205a087507430024177Doug Thompson insert_before = item; 6192d7bbb91c8df26c60d223205a087507430024177Doug Thompson break; 620da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 621da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 622da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 623da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox list_add_tail_rcu(&mci->link, insert_before); 624c0d121720220584bba2876b032e58a076b843fa1Dave Jiang atomic_inc(&edac_handlers); 625da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return 0; 6262d7bbb91c8df26c60d223205a087507430024177Doug Thompson 627052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail0: 6282d7bbb91c8df26c60d223205a087507430024177Doug Thompson edac_printk(KERN_WARNING, EDAC_MC, 629fd687502dc8037aa5a4b84c570ada971106574eeMauro Carvalho Chehab "%s (%s) %s %s already assigned %d\n", dev_name(p->pdev), 63017aa7e034416e3080bc57a786d09ba0a4a044561Stephen Rothwell edac_dev_name(mci), p->mod_name, p->ctl_name, p->mc_idx); 6312d7bbb91c8df26c60d223205a087507430024177Doug Thompson return 1; 6322d7bbb91c8df26c60d223205a087507430024177Doug Thompson 633052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail1: 6342d7bbb91c8df26c60d223205a087507430024177Doug Thompson edac_printk(KERN_WARNING, EDAC_MC, 635052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "bug in low-level driver: attempt to assign\n" 636052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson " duplicate mc_idx %d in %s()\n", p->mc_idx, __func__); 6372d7bbb91c8df26c60d223205a087507430024177Doug Thompson return 1; 638da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 639da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 640e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Petersonstatic void del_mc_from_global_list(struct mem_ctl_info *mci) 641a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson{ 642c0d121720220584bba2876b032e58a076b843fa1Dave Jiang atomic_dec(&edac_handlers); 643a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson list_del_rcu(&mci->link); 644e2e77098764636456ba7092a8b3b3b34b2a8e8d8Lai Jiangshan 645e2e77098764636456ba7092a8b3b3b34b2a8e8d8Lai Jiangshan /* these are for safe removal of devices from global list while 646e2e77098764636456ba7092a8b3b3b34b2a8e8d8Lai Jiangshan * NMI handlers may be traversing list 647e2e77098764636456ba7092a8b3b3b34b2a8e8d8Lai Jiangshan */ 648e2e77098764636456ba7092a8b3b3b34b2a8e8d8Lai Jiangshan synchronize_rcu(); 649e2e77098764636456ba7092a8b3b3b34b2a8e8d8Lai Jiangshan INIT_LIST_HEAD(&mci->link); 650a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson} 651a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson 652da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/** 6535da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * edac_mc_find: Search for a mem_ctl_info structure whose index is 'idx'. 6545da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * 6555da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * If found, return a pointer to the structure. 6565da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * Else return NULL. 6575da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * 6585da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * Caller must hold mem_ctls_mutex. 6595da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson */ 660079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonstruct mem_ctl_info *edac_mc_find(int idx) 6615da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson{ 6625da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson struct list_head *item; 6635da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson struct mem_ctl_info *mci; 6645da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson 6655da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson list_for_each(item, &mc_devices) { 6665da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson mci = list_entry(item, struct mem_ctl_info, link); 6675da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson 6685da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson if (mci->mc_idx >= idx) { 6695da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson if (mci->mc_idx == idx) 6705da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson return mci; 6715da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson 6725da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson break; 6735da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson } 6745da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson } 6755da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson 6765da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson return NULL; 6775da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson} 6785da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas ThompsonEXPORT_SYMBOL(edac_mc_find); 6795da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson 6805da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson/** 681472678ebd30d87cbe8d97562dcc0e46d1076040fDave Peterson * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and 682472678ebd30d87cbe8d97562dcc0e46d1076040fDave Peterson * create sysfs entries associated with mci structure 683da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * @mci: pointer to the mci structure to be added to the list 684da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 685da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Return: 686da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 0 Success 687da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * !0 Failure 688da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 689da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 690da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/* FIXME - should a warning be printed if no error detection? correction? */ 691b8f6f9755248026f21282e25cac49a1af698056cDoug Thompsonint edac_mc_add_mc(struct mem_ctl_info *mci) 692da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 693956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(0, "\n"); 694b8f6f9755248026f21282e25cac49a1af698056cDoug Thompson 695da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#ifdef CONFIG_EDAC_DEBUG 696da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (edac_debug_level >= 3) 697da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox edac_mc_dump_mci(mci); 698e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Peterson 699da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (edac_debug_level >= 4) { 700da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox int i; 701da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 702da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox for (i = 0; i < mci->nr_csrows; i++) { 703da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox int j; 704e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Peterson 705de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab edac_mc_dump_csrow(mci->csrows[i]); 706de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab for (j = 0; j < mci->csrows[i]->nr_channels; j++) 707de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab edac_mc_dump_channel(mci->csrows[i]->channels[j]); 708da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 7094275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < mci->tot_dimms; i++) 710de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab edac_mc_dump_dimm(mci->dimms[i]); 711da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 712da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#endif 71363b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_lock(&mem_ctls_mutex); 714da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 715da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (add_mc_to_global_list(mci)) 716028a7b6d3d9fa2cc41d76d45575345cca8d00a4cDave Peterson goto fail0; 717da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 718da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* set load time so that error rate can be tracked */ 719da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->start_time = jiffies; 720da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 7219794f33ddedd878dd92fcf8b4834391840366919eric wollesen if (edac_create_sysfs_mci_device(mci)) { 7229794f33ddedd878dd92fcf8b4834391840366919eric wollesen edac_mc_printk(mci, KERN_WARNING, 723052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "failed to create sysfs device\n"); 7249794f33ddedd878dd92fcf8b4834391840366919eric wollesen goto fail1; 7259794f33ddedd878dd92fcf8b4834391840366919eric wollesen } 726da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 72781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* If there IS a check routine, then we are running POLLED */ 72881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang if (mci->edac_check != NULL) { 72981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* This instance is NOW RUNNING */ 73081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mci->op_state = OP_RUNNING_POLL; 73181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 73281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang edac_mc_workq_setup(mci, edac_mc_get_poll_msec()); 73381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang } else { 73481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mci->op_state = OP_RUNNING_INTERRUPT; 73581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang } 73681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 737da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Report action taken */ 738bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson edac_mc_printk(mci, KERN_INFO, "Giving out device to '%s' '%s':" 73917aa7e034416e3080bc57a786d09ba0a4a044561Stephen Rothwell " DEV %s\n", mci->mod_name, mci->ctl_name, edac_dev_name(mci)); 740da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 74163b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_unlock(&mem_ctls_mutex); 742028a7b6d3d9fa2cc41d76d45575345cca8d00a4cDave Peterson return 0; 743da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 744052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail1: 745028a7b6d3d9fa2cc41d76d45575345cca8d00a4cDave Peterson del_mc_from_global_list(mci); 746028a7b6d3d9fa2cc41d76d45575345cca8d00a4cDave Peterson 747052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail0: 74863b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_unlock(&mem_ctls_mutex); 749028a7b6d3d9fa2cc41d76d45575345cca8d00a4cDave Peterson return 1; 750da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 7519110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_add_mc); 752da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 753da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/** 754472678ebd30d87cbe8d97562dcc0e46d1076040fDave Peterson * edac_mc_del_mc: Remove sysfs entries for specified mci structure and 755472678ebd30d87cbe8d97562dcc0e46d1076040fDave Peterson * remove mci structure from global list 75637f04581abac20444e5b7106c1e1f28bec5b989cDoug Thompson * @pdev: Pointer to 'struct device' representing mci structure to remove. 757da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 75818dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson * Return pointer to removed mci structure, or NULL if device not found. 759da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 760079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonstruct mem_ctl_info *edac_mc_del_mc(struct device *dev) 761da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 76218dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson struct mem_ctl_info *mci; 763da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 764956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(0, "\n"); 765bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 76663b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_lock(&mem_ctls_mutex); 76718dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson 768bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson /* find the requested mci struct in the global list */ 769bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson mci = find_mci_by_dev(dev); 770bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson if (mci == NULL) { 77163b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_unlock(&mem_ctls_mutex); 77218dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson return NULL; 77318dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson } 77418dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson 775da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox del_mc_from_global_list(mci); 77663b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_unlock(&mem_ctls_mutex); 777bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 778bb31b3122c0dd07d2d958da17a50ad771ce79e2bBorislav Petkov /* flush workq processes */ 779bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson edac_mc_workq_teardown(mci); 780bb31b3122c0dd07d2d958da17a50ad771ce79e2bBorislav Petkov 781bb31b3122c0dd07d2d958da17a50ad771ce79e2bBorislav Petkov /* marking MCI offline */ 782bb31b3122c0dd07d2d958da17a50ad771ce79e2bBorislav Petkov mci->op_state = OP_OFFLINE; 783bb31b3122c0dd07d2d958da17a50ad771ce79e2bBorislav Petkov 784bb31b3122c0dd07d2d958da17a50ad771ce79e2bBorislav Petkov /* remove from sysfs */ 785bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson edac_remove_sysfs_mci_device(mci); 786bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 787537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson edac_printk(KERN_INFO, EDAC_MC, 788052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "Removed device %d for %s %s: DEV %s\n", mci->mc_idx, 78917aa7e034416e3080bc57a786d09ba0a4a044561Stephen Rothwell mci->mod_name, mci->ctl_name, edac_dev_name(mci)); 790bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 79118dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson return mci; 792da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 7939110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_del_mc); 794da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 7952da1c119fd999cb834b4fe0c1a5a8c36195df1cbAdrian Bunkstatic void edac_mc_scrub_block(unsigned long page, unsigned long offset, 7962da1c119fd999cb834b4fe0c1a5a8c36195df1cbAdrian Bunk u32 size) 797da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 798da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct page *pg; 799da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox void *virt_addr; 800da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox unsigned long flags = 0; 801da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 802956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\n"); 803da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 804da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* ECC error page was not in our memory. Ignore it. */ 805079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson if (!pfn_valid(page)) 806da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return; 807da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 808da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Find the actual page structure then map it and fix */ 809da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox pg = pfn_to_page(page); 810da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 811da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (PageHighMem(pg)) 812da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox local_irq_save(flags); 813da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 8144e5df7ca3091a846b65f2a940a68506790a62d6aCong Wang virt_addr = kmap_atomic(pg); 815da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 816da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Perform architecture specific atomic scrub operation */ 817da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox atomic_scrub(virt_addr + offset, size); 818da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 819da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Unmap and complete */ 8204e5df7ca3091a846b65f2a940a68506790a62d6aCong Wang kunmap_atomic(virt_addr); 821da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 822da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (PageHighMem(pg)) 823da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox local_irq_restore(flags); 824da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 825da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 826da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/* FIXME - should return -1 */ 827e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Petersonint edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, unsigned long page) 828da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 829de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab struct csrow_info **csrows = mci->csrows; 830a895bf8b1e1ea4c032a8fa8a09475a2ce09fe77aMauro Carvalho Chehab int row, i, j, n; 831da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 832956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(1, "MC%d: 0x%lx\n", mci->mc_idx, page); 833da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox row = -1; 834da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 835da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox for (i = 0; i < mci->nr_csrows; i++) { 836de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab struct csrow_info *csrow = csrows[i]; 837a895bf8b1e1ea4c032a8fa8a09475a2ce09fe77aMauro Carvalho Chehab n = 0; 838a895bf8b1e1ea4c032a8fa8a09475a2ce09fe77aMauro Carvalho Chehab for (j = 0; j < csrow->nr_channels; j++) { 839de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab struct dimm_info *dimm = csrow->channels[j]->dimm; 840a895bf8b1e1ea4c032a8fa8a09475a2ce09fe77aMauro Carvalho Chehab n += dimm->nr_pages; 841a895bf8b1e1ea4c032a8fa8a09475a2ce09fe77aMauro Carvalho Chehab } 842a895bf8b1e1ea4c032a8fa8a09475a2ce09fe77aMauro Carvalho Chehab if (n == 0) 843da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox continue; 844da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 845956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "MC%d: first(0x%lx) page(0x%lx) last(0x%lx) mask(0x%lx)\n", 846956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches mci->mc_idx, 847956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches csrow->first_page, page, csrow->last_page, 848956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches csrow->page_mask); 849da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 850da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if ((page >= csrow->first_page) && 851da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox (page <= csrow->last_page) && 852da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox ((page & csrow->page_mask) == 853da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox (csrow->first_page & csrow->page_mask))) { 854da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox row = i; 855da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox break; 856da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 857da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 858da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 859da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (row == -1) 860537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson edac_mc_printk(mci, KERN_ERR, 861052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "could not look up page error address %lx\n", 862052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson (unsigned long)page); 863da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 864da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return row; 865da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 8669110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_find_csrow_by_page); 867da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 8684275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehabconst char *edac_layer_name[] = { 8694275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab [EDAC_MC_LAYER_BRANCH] = "branch", 8704275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab [EDAC_MC_LAYER_CHANNEL] = "channel", 8714275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab [EDAC_MC_LAYER_SLOT] = "slot", 8724275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab [EDAC_MC_LAYER_CHIP_SELECT] = "csrow", 8734275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab}; 8744275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho ChehabEXPORT_SYMBOL_GPL(edac_layer_name); 8754275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 8764275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehabstatic void edac_inc_ce_error(struct mem_ctl_info *mci, 8774275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab bool enable_per_layer_report, 8784275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const int pos[EDAC_MAX_LAYERS]) 879da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 8804275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab int i, index = 0; 881da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 8825926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab mci->ce_mc++; 883da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 8844275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (!enable_per_layer_report) { 8854275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->ce_noinfo_count++; 886da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return; 887da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 888e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Peterson 8894275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < mci->n_layers; i++) { 8904275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (pos[i] < 0) 8914275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab break; 8924275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab index += pos[i]; 8934275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->ce_per_layer[i][index]++; 8944275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 8954275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (i < mci->n_layers - 1) 8964275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab index *= mci->layers[i + 1].size; 8974275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 8984275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab} 8994275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 9004275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehabstatic void edac_inc_ue_error(struct mem_ctl_info *mci, 9014275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab bool enable_per_layer_report, 9024275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const int pos[EDAC_MAX_LAYERS]) 9034275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab{ 9044275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab int i, index = 0; 9054275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 9065926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab mci->ue_mc++; 9074275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 9084275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (!enable_per_layer_report) { 9094275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->ce_noinfo_count++; 910da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return; 911da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 912da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 9134275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < mci->n_layers; i++) { 9144275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (pos[i] < 0) 9154275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab break; 9164275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab index += pos[i]; 9174275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->ue_per_layer[i][index]++; 918a7d7d2e1a07e3811dc49af2962c940fd8bbb6c8fMauro Carvalho Chehab 9194275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (i < mci->n_layers - 1) 9204275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab index *= mci->layers[i + 1].size; 9214275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 9224275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab} 923da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 9244275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehabstatic void edac_ce_error(struct mem_ctl_info *mci, 9254275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const int pos[EDAC_MAX_LAYERS], 9264275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *msg, 9274275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *location, 9284275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *label, 9294275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *detail, 9304275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *other_detail, 9314275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const bool enable_per_layer_report, 9324275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const unsigned long page_frame_number, 9334275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const unsigned long offset_in_page, 93453f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab long grain) 9354275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab{ 9364275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab unsigned long remapped_page; 9374275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 9384275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (edac_mc_get_log_ce()) { 9394275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (other_detail && *other_detail) 9404275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_mc_printk(mci, KERN_WARNING, 94153f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab "CE %s on %s (%s %s - %s)\n", 9424275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab msg, label, location, 9434275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab detail, other_detail); 9444275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab else 9454275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_mc_printk(mci, KERN_WARNING, 94653f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab "CE %s on %s (%s %s)\n", 9474275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab msg, label, location, 9484275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab detail); 9494275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 9504275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_inc_ce_error(mci, enable_per_layer_report, pos); 951da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 952da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (mci->scrub_mode & SCRUB_SW_SRC) { 953da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* 9544275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * Some memory controllers (called MCs below) can remap 9554275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * memory so that it is still available at a different 9564275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * address when PCI devices map into memory. 9574275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * MC's that can't do this, lose the memory where PCI 9584275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * devices are mapped. This mapping is MC-dependent 9594275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * and so we call back into the MC driver for it to 9604275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * map the MC page to a physical (CPU) page which can 9614275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * then be mapped to a virtual page - which can then 9624275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * be scrubbed. 9634275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 964da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox remapped_page = mci->ctl_page_to_phys ? 965052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson mci->ctl_page_to_phys(mci, page_frame_number) : 966052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson page_frame_number; 967da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 9684275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_mc_scrub_block(remapped_page, 9694275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab offset_in_page, grain); 970da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 971da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 972da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 9734275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehabstatic void edac_ue_error(struct mem_ctl_info *mci, 9744275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const int pos[EDAC_MAX_LAYERS], 9754275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *msg, 9764275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *location, 9774275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *label, 9784275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *detail, 9794275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *other_detail, 9804275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const bool enable_per_layer_report) 981da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 9824275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (edac_mc_get_log_ue()) { 9834275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (other_detail && *other_detail) 9844275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_mc_printk(mci, KERN_WARNING, 98553f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab "UE %s on %s (%s %s - %s)\n", 9864275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab msg, label, location, detail, 9874275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab other_detail); 9884275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab else 9894275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_mc_printk(mci, KERN_WARNING, 99053f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab "UE %s on %s (%s %s)\n", 9914275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab msg, label, location, detail); 9924275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 993e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Peterson 9944275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (edac_mc_get_panic_on_ue()) { 9954275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (other_detail && *other_detail) 9964275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab panic("UE %s on %s (%s%s - %s)\n", 9974275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab msg, label, location, detail, other_detail); 9984275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab else 9994275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab panic("UE %s on %s (%s%s)\n", 10004275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab msg, label, location, detail); 10014275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 10024275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 10034275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_inc_ue_error(mci, enable_per_layer_report, pos); 1004da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 1005da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 10064275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab#define OTHER_LABEL " or " 100753f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab 100853f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab/** 100953f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * edac_mc_handle_error - reports a memory event to userspace 101053f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * 101153f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @type: severity of the error (CE/UE/Fatal) 101253f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @mci: a struct mem_ctl_info pointer 101353f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @page_frame_number: mem page where the error occurred 101453f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @offset_in_page: offset of the error inside the page 101553f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @syndrome: ECC syndrome 101653f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @top_layer: Memory layer[0] position 101753f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @mid_layer: Memory layer[1] position 101853f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @low_layer: Memory layer[2] position 101953f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @msg: Message meaningful to the end users that 102053f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * explains the event 102153f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @other_detail: Technical details about the event that 102253f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * may help hardware manufacturers and 102353f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * EDAC developers to analyse the event 102453f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @arch_log: Architecture-specific struct that can 102553f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * be used to add extended information to the 102653f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * tracepoint, like dumping MCE registers. 102753f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab */ 10284275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehabvoid edac_mc_handle_error(const enum hw_event_mc_err_type type, 10294275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab struct mem_ctl_info *mci, 10304275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const unsigned long page_frame_number, 10314275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const unsigned long offset_in_page, 10324275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const unsigned long syndrome, 103353f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab const int top_layer, 103453f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab const int mid_layer, 103553f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab const int low_layer, 10364275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *msg, 10374275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *other_detail, 103853f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab const void *arch_log) 1039da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 10404275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* FIXME: too much for stack: move it to some pre-alocated area */ 10414275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab char detail[80], location[80]; 10424275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab char label[(EDAC_MC_LABEL_LEN + 1 + sizeof(OTHER_LABEL)) * mci->tot_dimms]; 10434275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab char *p; 10444275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab int row = -1, chan = -1; 104553f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab int pos[EDAC_MAX_LAYERS] = { top_layer, mid_layer, low_layer }; 10464275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab int i; 104753f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab long grain; 10484275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab bool enable_per_layer_report = false; 104953f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab u16 error_count; /* FIXME: make it a parameter */ 105053f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab u8 grain_bits; 1051da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 1052956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "MC%d\n", mci->mc_idx); 1053da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 10544275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* 10554275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * Check if the event report is consistent and if the memory 10564275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * location is known. If it is known, enable_per_layer_report will be 10574275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * true, the DIMM(s) label info will be filled and the per-layer 10584275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * error counters will be incremented. 10594275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 10604275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < mci->n_layers; i++) { 10614275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (pos[i] >= (int)mci->layers[i].size) { 10624275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (type == HW_EVENT_ERR_CORRECTED) 10634275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab p = "CE"; 10644275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab else 10654275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab p = "UE"; 10664275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 10674275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_mc_printk(mci, KERN_ERR, 10684275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab "INTERNAL ERROR: %s value is out of range (%d >= %d)\n", 10694275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_layer_name[mci->layers[i].type], 10704275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab pos[i], mci->layers[i].size); 10714275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* 10724275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * Instead of just returning it, let's use what's 10734275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * known about the error. The increment routines and 10744275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * the DIMM filter logic will do the right thing by 10754275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * pointing the likely damaged DIMMs. 10764275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 10774275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab pos[i] = -1; 10784275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 10794275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (pos[i] >= 0) 10804275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab enable_per_layer_report = true; 1081da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 1082da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 10834275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* 10844275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * Get the dimm label/grain that applies to the match criteria. 10854275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * As the error algorithm may not be able to point to just one memory 10864275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * stick, the logic here will get all possible labels that could 10874275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * pottentially be affected by the error. 10884275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * On FB-DIMM memory controllers, for uncorrected errors, it is common 10894275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * to have only the MC channel and the MC dimm (also called "branch") 10904275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * but the channel is not known, as the memory is arranged in pairs, 10914275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * where each memory belongs to a separate channel within the same 10924275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * branch. 10934275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 10944275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab grain = 0; 10954275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab p = label; 10964275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab *p = '\0'; 10974275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < mci->tot_dimms; i++) { 1098de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab struct dimm_info *dimm = mci->dimms[i]; 1099da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 110053f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab if (top_layer >= 0 && top_layer != dimm->location[0]) 11014275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab continue; 110253f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab if (mid_layer >= 0 && mid_layer != dimm->location[1]) 11034275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab continue; 110453f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab if (low_layer >= 0 && low_layer != dimm->location[2]) 11054275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab continue; 1106da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 11074275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* get the max grain, over the error match range */ 11084275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (dimm->grain > grain) 11094275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab grain = dimm->grain; 11109794f33ddedd878dd92fcf8b4834391840366919eric wollesen 11114275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* 11124275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * If the error is memory-controller wide, there's no need to 11134275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * seek for the affected DIMMs because the whole 11144275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * channel/memory controller/... may be affected. 11154275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * Also, don't show errors for empty DIMM slots. 11164275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 11174275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (enable_per_layer_report && dimm->nr_pages) { 11184275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (p != label) { 11194275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab strcpy(p, OTHER_LABEL); 11204275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab p += strlen(OTHER_LABEL); 11214275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 11224275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab strcpy(p, dimm->label); 11234275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab p += strlen(p); 11244275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab *p = '\0'; 11254275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 11264275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* 11274275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * get csrow/channel of the DIMM, in order to allow 11284275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * incrementing the compat API counters 11294275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 1130956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "%s csrows map: (%d,%d)\n", 1131956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches mci->mem_is_per_rank ? "rank" : "dimm", 1132956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches dimm->csrow, dimm->cschannel); 11334275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (row == -1) 11344275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab row = dimm->csrow; 11354275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab else if (row >= 0 && row != dimm->csrow) 11364275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab row = -2; 11374275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 11384275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (chan == -1) 11394275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab chan = dimm->cschannel; 11404275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab else if (chan >= 0 && chan != dimm->cschannel) 11414275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab chan = -2; 11424275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 11439794f33ddedd878dd92fcf8b4834391840366919eric wollesen } 11449794f33ddedd878dd92fcf8b4834391840366919eric wollesen 11454275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (!enable_per_layer_report) { 11464275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab strcpy(label, "any memory"); 11474275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } else { 1148956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "csrow/channel to increment: (%d,%d)\n", row, chan); 11494275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (p == label) 11504275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab strcpy(label, "unknown memory"); 11514275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (type == HW_EVENT_ERR_CORRECTED) { 11524275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (row >= 0) { 1153de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab mci->csrows[row]->ce_count++; 11544275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (chan >= 0) 1155de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab mci->csrows[row]->channels[chan]->ce_count++; 11564275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 11574275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } else 11584275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (row >= 0) 1159de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab mci->csrows[row]->ue_count++; 11609794f33ddedd878dd92fcf8b4834391840366919eric wollesen } 11619794f33ddedd878dd92fcf8b4834391840366919eric wollesen 11624275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* Fill the RAM location data */ 11634275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab p = location; 11644275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < mci->n_layers; i++) { 11654275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (pos[i] < 0) 11664275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab continue; 11679794f33ddedd878dd92fcf8b4834391840366919eric wollesen 11684275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab p += sprintf(p, "%s:%d ", 11694275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_layer_name[mci->layers[i].type], 11704275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab pos[i]); 11719794f33ddedd878dd92fcf8b4834391840366919eric wollesen } 117253f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab if (p > location) 117353f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab *(p - 1) = '\0'; 117453f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab 117553f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab /* Report the error via the trace interface */ 117653f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab 117753f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab error_count = 1; /* FIXME: allow change it */ 117853f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab grain_bits = fls_long(grain) + 1; 117953f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab trace_mc_event(type, msg, label, error_count, 118053f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab mci->mc_idx, top_layer, mid_layer, low_layer, 118153f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab PAGES_TO_MiB(page_frame_number) | offset_in_page, 118253f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab grain_bits, syndrome, other_detail); 1183a7d7d2e1a07e3811dc49af2962c940fd8bbb6c8fMauro Carvalho Chehab 11844275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* Memory type dependent details about the error */ 11854275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (type == HW_EVENT_ERR_CORRECTED) { 11864275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab snprintf(detail, sizeof(detail), 118753f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab "page:0x%lx offset:0x%lx grain:%ld syndrome:0x%lx", 11884275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab page_frame_number, offset_in_page, 11894275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab grain, syndrome); 11904275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_ce_error(mci, pos, msg, location, label, detail, 11914275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab other_detail, enable_per_layer_report, 11924275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab page_frame_number, offset_in_page, grain); 11934275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } else { 11944275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab snprintf(detail, sizeof(detail), 119553f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab "page:0x%lx offset:0x%lx grain:%ld", 11964275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab page_frame_number, offset_in_page, grain); 11979794f33ddedd878dd92fcf8b4834391840366919eric wollesen 11984275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_ue_error(mci, pos, msg, location, label, detail, 11994275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab other_detail, enable_per_layer_report); 12004275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 12019794f33ddedd878dd92fcf8b4834391840366919eric wollesen} 12024275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho ChehabEXPORT_SYMBOL_GPL(edac_mc_handle_error); 1203